Image processing apparatus, image pickup apparatus, and image processing method that use a super-resolution technique for generating a super-resolution image

摘要

An image processing apparatus includes: a high-pass filter that extracts a high-frequency component of an input image; an edge judgment unit that judges whether there is an edge based on the high-frequency component and estimates an edge position when there is an edge; a coordinate conversion unit that obtains an edge position in an enlarged image corresponding to the estimated edge position; an interpolation unit that obtains, regarding a position where an edge position of the high-frequency component and the edge position of the enlarged image overlap, a pixel value at each pixel position of an edge circumference of the enlarged image using a pixel value of the high-frequency component; a first enlargement processing unit that generates the enlarged image by enlarging by a desired enlargement factor; and a synthesis unit that synthesizes the interpolated pixel value of the high-frequency component and the pixel value of the enlarged image.

主权项

1. An image processing apparatus, comprising:
a processor; and a memory, the memory storing program code executable by the processor to perform operations comprising: high-pass filtering to extract a high-frequency component of an input image; edge judgment to judge whether there is an edge in the input image based on the high-frequency component of the input image extracted by the high-pass filtering and estimate an edge position when there is an edge; coordinate conversion to obtain an edge position in an enlarged image obtained by enlarging the input image, the edge position corresponding to the edge position estimated by the edge judgment; interpolation to obtain, regarding a position where an edge position of the high-frequency component of the input image and the edge position of the enlarged image overlap, a pixel value at each pixel position of an edge circumference of the enlarged image using a pixel value of the high-frequency component of the input image; first enlargement processing to generate the enlarged image by enlarging the input image by a desired enlargement factor; and synthesis to synthesize the interpolated pixel value of the high-frequency component of the edge circumference and the pixel value of the pixel of the enlarged image.